Paper-making belt or fourdrinier wire



Feb. 10. 1925.

- 1,525,881 J. J. OB RIEN V PAPER MAKING BELT OR FOURDRINIER WIRE Original Fi1ed March 25,1920,-

HZULU D UUUUUUUU m w m D H@ a Z INVENTUR Patented eb. 10, 1 925.

UNITED v STATES new PATENT onion JOS EPH. OBRIEN, OF.SPRTNGFIELD, MASSACHUSETTS.

PAPER-MAKING BELT OR FOURDRINIER WIRE.

Application filed March 25, 1920, Serial No. 368,662. Renewed November 7, 1923.-

To all whom it may concern:

Beit known-that Josnrn J.'OBRIEN, a

citizen of the United States of America, re-

siding at Springfield, in the county of Hampden and State of Massachusetts, has

invented certain new and useful Improvements in Paper-Making Belts or.F0urdrinier Wires, of which the following is a spec1- fication.

This invention relates to improvements in' paper making belts or Fourdrinie'r wires and its leading object is to .p'rovidex'a belt or wire having a pulp supporting surface of uniform height throughout and including "transverse strips and longitudinal connecting wires all arranged so that the transverse strips provide Water spaces through which the surplus water may be sucked by the suction boxes of the paper making machine. The transverse strips are spaced from each tween the curves of the serpentine strips determines the size of the water openings in the belt of .wire' construction and the serpentine strips are of the same width as the transverse strips.

One of the objects of the'invention is to I provide a pulp working for-aminous belt or Fourdrinier wire wherein shearing action 30 between intersecting longitudinal and transverse members of-the belt or wire are reduced to a minimum and the working surfaces of the belt or wire maintained at a unifonmheightthroughout so. as to avoid forming minute indentations in the paper pulp as it is worked by the belt or wire from the suction boxes. e

, With the above and other objects in View this invention relates to certain' new and useful construct1ons, combinations and arrangements of parts, clearly described in the following specification and fully illustrated in the accompanying drawings, in which;

Figure 1 is a fragmental s1de elevation of the wetend of the paper making machine showing my improved pulp working belt or' Fourdrinierwire in operative relation to the suction boxes thereof,

Figure 2 is a detail view'on a'similar' s'cale illustrating the endless construction of the belt or wire.

Figure 3 is a detail fragmentary pla view of the belt or wire taken on an enlarged scale.

Figure is a' similar view greatly mag- Figure 5 is a detail edge view of Figure i;

Referring to the accompanying drawings 5 des gnates the frame of the paper making machine which includes the usual suction boxes 6-. My improved Fourdrinierwire or I paper'making belt 7 is mounted tomoire =in the usual manner over the suction boxes 6.

supporting end rolls 8 over thesuction .boxes 6. 1

In the manufacture of paper minute irregularities are left in the surface of the paper. due .tothe verticalbending of the warp and woof strands of the wire fabric,

and these irregularities result in imperfect printing when the paper is worked in the ordinary process ofpublication. The. constant bending of the wire fabric develops a ,shearing action between the wairp and woof strands and in time the wire breaks and the tendency to break is intensified by the pressure exerted by the suction boxes and the paper pulp, and the wire itself against thepaper making machine.

In my improved paper working belt or Fourdrinier wire flat wire and serpentine wire strips-are used in place of the ordinary round wire strands and the warp threads or wires are extendedthrough openings formed the warp threads or wires being located midway-between the upper and lower edges of the transverse'strips so that they will remain out of contact at all times with the paper pulp... The flat and serpentine strips are all of equal diameter and the warp threads or wiresextend therethrqugh so that the upper edgeportions and thetransverse strips will be s aced equally above the warp in the transverse fl'at or serpentinestrips,

. the water passages 12 provided between said serpentine. strips and the flat strips.

As shown in Figures 4 and 5 the outer faces ofthe serpentine strips are in contact with the adjacent faces of the fiat strips and the Warp threads or wiresllare ex tended through the engaging serpentine and I flat strips which are spaced an equal distance from each other. The-fiat strips 9 are formed with extruded openings 9* .on one side thereof and 'QTon the opposite side thereof, while the' serpentine strips .are formed with extruded openings 1O on one side thereof and 10 on the opposite side thereof through which the warpwires or consisting of a series of transverse flatthreads 11 extend, thusproviding contacting surfaces between the transverse strips of the warp wires or threads of greater width than the thickness of the strips them:

selves, and thus minimizing the abrasive action of the engaged parts. The ends of the warp wires or threads are connected to each other as in'the customary Fourdrinier.

wire constructionso as to make the entire fabric, an endless construction as-indicated in Figure 2. The material extruded in forming the openings is in the nature of ing wires.

burrs, which provide minute spacing tubes for holding the'confronting strips spaced apart, and for providing relatively long contact between the strips and the connect- In using the improved paper working belt or fabric the transverse strips have contacting engagement with the pulpand as the upper edge portions of the .transverse strips are of equal height and a level surface is presented to the belt which prevents the formation of minute irregularities or inde'n tations such as tend to prevent the proper rinting of the paper.; Owing to the flexiility of the serpentine strips the fabric "will bend easily around the roller. I Bymraking the curves long or short the number of warp threads or wires used may be varied at will.

Having described my invention, I claim: 1. A paper working fabricbelt consisting of a plurality of transverse strips arranged to provide Water passages therebe-' tween and means connecting the strips to' each other to provide an endless'belt construction.

, 2. A paper working fabric consisting of a series of flat transverse strips, a series of serpentine transverse strips disposed alternately therebetween and means connecting the strips to each other to less belt constructio'n.

3. A paper Working fabric or the like consisting of a series of flat transverse strips, a series of serpentine transverse strips. disposed alternately therebetween provide an endi and spacing the first strips'from each other I to provide water passages and means connecting the strips to each other to provide an endless belt construction 4. A paper working fabric' or the like consisting of a series of flat strips, a series of. serpentine strips located alternately between the flat strips and providing water passages therebetwen, and warp threads or wires e-xtending'through the'strips to pro vide an endless belt construction.

5. A paper Working fabric consisting of members connected to each other to provide an endless belt construction and presenting pulp engaging surfaces of uniform height. 6. A paper Working faloric or the like strips disposed alternately therebetween the first strips therefrom to provide a series of passages between the strips, and means connecting the strips to each other. I

8. A paper working fabric consisting of a series of transverse flat strips, a second series of strip-s alternately disposed between one of said series having offset portions spacing the strips of the other series there- -and provided with .ofiset portions spacing from, and flexible connecting means passing through all of the strips.

9. A paper working fabric consistlng'of a series of strips, a secondseries of strips disposed alternately between the first series, and means carriedfby one of the strip series for spacing the member strips of the other series therefrom to provide a series of -restricted Water passages between the strips.

10. A paper working-fabric consisting of a series of strips, and flexible connecting means therefor, certain of the strips being spaced-from the other strips to provide a series of water passages between the strips,

the connecting means being spaced inwardly of the working edge surfaces of the strips. a Signed by me at Springfield,

li/I assachu setts.

JOSEPH J. OBRIEN.

the strips of the first series, the strips of 

